Non-hermitian multiconfiguration molecular mechanics

Oksana Tishchenko, Donald G. Truhlar

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We present a new version of the multiconfiguration molecular mechanics (MCMM) algorithm for fitting potential energy surfaces of complex reactive systems. The main improvement consists in allowing the valence bond configuration interaction matrix to be non-Hermitian, which broadens the range of geometries over which the potential energy surface can be fit accurately. A second improvement is that the new algorithm has simpler gradients and Hessians and executes faster. The performance of the new algorithm is evaluated using the example of two model reactions.

Original languageEnglish (US)
Pages (from-to)1454-1461
Number of pages8
JournalJournal of Chemical Theory and Computation
Issue number6
StatePublished - Jun 9 2009


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